US PATENT SUBCLASS 370 / 274
.~ Repeater
Current as of: June, 1999
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DEFINITION
Classification: 370/274
Repeater:
(under subclass 273) Subject matter in which a retransmission station is adapted to quadruplex work.
SEE OR SEARCH THIS CLASS, SUBCLASS:
279, and 293, for a radio and a wire duplex repeater, respectively.
315+, for a repeater used in communication over free space.
492, for a repeater used in multiplex communications over frequency channels.
501, for a repeater used in multiplex communications over time channels.
SEE OR SEARCH CLASS 178, Telegraphy,
70+, for a repeating system other than quadruplex repeater.
330, Amplifiers, appropriate subclasses, particularly
61, for amplifier (one-way repeater).
375, Pulse or Digital Communications,
211+, for a pulse or digital repeater communication system.
379, Telephonic Communications,
338+, for a two way repeater, specific to telephony and acting usually through varying current and contact pressure rather than by current interruptions.
455, Telecommunications,
7+, for analog repeater communication systems.
